<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button
            type="primary"
            style="margin-bottom: 15px"
            @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <tree-table
        :data="catelist"
        :columns="columns"
        :selectionType="false"
        :expandType="false"
        showIndex
        indexText="#"
        border
        :showRowHover="false"
      >
        <template slot="isok" slot-scope="scope">
          <i
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
            class="el-icon-success"
          ></i>
          <i v-else class="el-icon-error" style="color: red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            type="success"
            v-else-if="scope.row.cat_level === 1"
            size="mini"
            >二级</el-tag
          >
          <el-tag type="warning" v-else="scope.row.cat_level === 2" size="mini"
            >三级</el-tag
          >
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
          ></el-button>
        </template>
        <!-- <template v-slot:isok ='scope' 也可以 -->
      </tree-table>
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="this.queryInfo.pagenum"
        :page-sizes="[3, 8, 15, 20]"
        :page-size="this.queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="this.total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close='addCateDialogClosed'
    >
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <!-- 上面的prop是验证规则而不是数据源 -->
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级名称">
          <el-cascader
            clearable change-on-select
            v-model="selectedKeys"
            :options="parentCatelist"
            :props="{expandTrigger: 'hover',value:'cat_id',label:'cat_name',children:'children'}"
            @change="parentCateChanged"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [], //商品分类列表
      parentCatelist: [], //父级分类列表
      queryInfo: {
        //查询条件
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      total: 0, //总数据条数
      columns: [
        { label: '分类名称', prop: 'cat_name' },
        { label: '是否有效', type: 'template', template: 'isok' },
        { label: '排序', type: 'template', template: 'order' },
        { label: '操作', type: 'template', template: 'opt' },
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0, //父分类id，为0时为一级分类
        cat_level: 0, //默认等级是一级分类
      },
      addCateFormRules: {
        //验证规则
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ],
      },
      selectedKeys:[] //选中的父级分类数组
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo,
      })
      if (res.meta.status != 200) return this.$message.error('获取商品列表失败')
      console.log(res.data)
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      //监听pagesize
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newNum) {
      this.queryInfo.pagenum = newNum
      this.getCateList()
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 },
      })
      if (res.meta.status !== 200)
        return this.$message.error('获取父级分类失败')
      this.parentCatelist = res.data
      console.log(this.parentCatelist)
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    parentCateChanged(){
        console.log(this.selectedKeys)
        if(this.selectedKeys.length>0){
           this.addCateForm.cat_pid= this.selectedKeys[this.selectedKeys.length-1]
           this.addCateForm.cat_level=this.selectedKeys.length
        }
        else{
           this.addCateForm.cat_pid=0
           this.addCateForm.cat_level=0 
        }
    },
    addCate(){
        console.log(this.addCateForm);
        this.$refs.addCateFormRef.validate(async valid=>{
            if(!valid) return 
            const{data:res}= await this.$http.post('categories',this.addCateForm)
            if(res.meta.status!==201) return this.$message.error('添加新产品失败')
            this.$message.success('添加成功')
            this.getCateList()
             this.addCateDialogVisible=false
        })
       
    },
    addCateDialogClosed(){
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys=[]
      this.addCateForm.cat_pid=0
      this.addCateForm.cat_level=0
    }
  },
}
</script>

<style scopted>
.el-cascader{
    width:100%
}
.el-cascader-menu{height:300px}
</style>